formatting, full migration to svelte-french-toast

.devcontainer/Dockerfile

@@ -1,6 +1,5 @@
 FROM mcr.microsoft.com/vscode/devcontainers/base:alpine-3.12
 RUN apk update
 RUN apk add --upgrade nodejs-current npm
-RUN npm i -g yarn rimraf
-RUN rimraf node_modules
-RUN yarn set version berry
+RUN npm i -g pnpm rimraf
+RUN rimraf node_modules